Using proxied interface in SDWAN Internet setup

Hi Folks,

I’m new to Fortinet and the community and I’m reaching out for guidance please.

I work for a Gov funded educational org and have been tasked with implementing a SDWAN PoC for Internet access at our remote sites.

SETUP –

Each site is equipped with a DIA ISP link and we will have access to a Gov provided WAN link that uses a client-side webscript proxy for Internet services.

I’ve used the instructions from this Youtube video to plan and configure how the SDWAN setup would be on a Fortigate appliance:

https://www.youtube.com/watch?v=K9IUwPXTt3U&t=423s

DIA public IP – 194.x.x.184 (Primary)

Gov link – 10.x.x.254 / webscript (secondary)

Both links would be members of the same SDWAN zone with a simple performance SLA and best quality SDWAN rule. A static route would be configured to send all traffic (0.0.0.0) to the SDWAN zone.

Firewall policies to allow traffic would also be configured as per instructions.

My question/concern is if the proxied link could be used in an SDWAN setup and if so, would any special configuration need to be performed?

Thanks in advance for any suggestions.